How to Clear Hair Buildup Before a Lab Test

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Skip heavy conditioners and styling products for a few days before your test. Wash your hair twice with a gentle clarifying shampoo, focusing on the scalp. Rinse thoroughly with warm water, not hot, to avoid stripping natural oils. If you use dry shampoo, brush it out completely. Avoid oils, gels, and leave-ins. This clears residue so your scalp is clean and ready.